But Bayern’s sporting director Sammer has insisted some responsibility must lie with the clubs in competition with Pep Guardiola’s side.

"We should discuss why other clubs are not that good right now,” Sammer told Sport1 on Thursday and said that other clubs moaning about Bayern’s dominance is “a bit absurd".

"Maybe we are superior in quality and also in mentality right now," he continued. "And maybe the message to the other clubs is: Do they train every single day with utmost care as if there was no tomorrow? The daily training, the daily addresses are the product of a development. And some clubs in Germany don’t have that."

The spotlight has mostly been on the exchange of arguments between Bayern and Dortmund, which have been exacerbated by recent comments made by Aki Watzke.

The Dortmund CEO said that Bayern were out to destroy Dortmund, but Sammer replied that Watzke was “appealing to the baser human instincts” with his comments.

On Wednesday, Watzke told Sport Bild that his relationship with the former BVB player and coach had "cooled a bit".

"It’s totally legit to try to checkmate a rival. That’s also the case in the free enterprise. But it’s equally legit to address it. I don’t fear Matthias Sammer or anyone else," Watzke said.

"When I am of the opinion that something needs to be said in the sense of Borussia Dortmund, then I will do so."

Meanwhile, German media ran reports that Bayern Munich have held exploratory talks with Ilkay Gundoga’s representatives.

The Munich daily TZ suggested that Sammer is the driving force behind Bayern’s move for the Dortmund midfielder, who would be the third BVB star to switch allegiances following the transfers of Mario Goetze in 2013, and Robert Lewandowski this summer.